Geobge b



(No Model.)

G- B. MERSHON.

GRATE. l

Patented July 17, 1883.

GEORGE B. MERSHON, OF PHILADELPHIA, PENNSYLVANIA.

\ GR%ATE.

7 SPECIFICATION formingpart of Letterls Patent No. 281,384, dated July 17, 1883.

Application filed Ap To aZZ whom it may concern: i

Be it known that I, GEORGE B. MERsHoN, a citizen of the United States, and a resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented cer tain new and useful Improvements in Grates, of which the following is a specification.

\ My invention relates to that class of grate in which the bars are provided with side lugs or fingers, and are rocked in order to clean the fire; and it consists of certain improve-j ments-in the construction of thebars, bar-supf ports, and operating appliances, fully de-L scribed hereinafter, and illustrated in the accompanying drawings,in which- Figure 1 is a perspective view of the out;

' side'of a furnace. showing the bar-operating appliances. Fig. 2 is a plan of part of Fig. 1.5

Fig. 3 is a detached section of part of the rock-5 ing appliance. Fig. 4 is asectional elevation; showing a grate-bar, part of the frame, and op-i crating appliances. Fig. 5 is aplan of Fig. 4, and Fig. 6 a modification.

In that class of rocking-bar grates illustratedin various patents heretofore granted to me the bars have journals extending forward, and provided with arms connected with a cross; bar, by reciprocating which all the grate-bars will be simultaneously rocked. While this is serviceable for stoves and small furnaces, the simultaneous moving of all the bars is sometimes objectionable when the fire-bed is very large, owing to the difficulty of moving so great a number of bars, and because one portion of the fire will sometimes require raking when another portion will not. I overcome this objection by dividing the grate-bars into two or more sections and connecting the arms of each section to one connecting-bar, whereby each section or series of bars may be rocked independently of the others. Thus in Fig. 1 the connecting-bar B, attached to the arms of three of the grate-bars, may be operated independently of the bar B, connected to three others of the grate-bars.

Heretofore the arms D have been temporarily fastened by pins or otherwise to the projecting ends of the bar-j ournals. This has ren dered their detachment and connection somewhat difficult. I therefore form in the ends of each journal a socket, 00, adapted to receive the end of the arm D, which projects upward,

11' 2-1, 1883. (No model.)

as shown at the rightin Fig. 1, and is 0011- Y nected by a pin to the bar B, so that by simply lifting the latter all the arms D may at once be detached.

Heretofore it has been common to so connect one of the bars of a grate as to permit it to be form at the under side of the bed-plate E, at r the rear, a loop or series of loops, F, and I provide each bar G with a rear trunnion, a,which is horizontal adjacent to the bar, and is then curved downward, as shown in Fig. 4. The

horizontal portion of the trunnion lies in contact with the loop F, so that the bar will rock as usual; but when the front support is removed, it will fall, turning upon its bearing F, but without becoming detached therefrom. The front support is a short shaft, H, supported in a hanger, I, so as to rock therein, and provided with a pin, 11, which may limit the rocking motion, and with a rectangular stud, d, fitting a socket, e, in the end of the bar. the hanger I is slotted, so as to permit the shaft H to have a longitudinal movement to withdraw the stud from the socket e.

In a separate application for Letters Patent a claim was allowed me for curving the sides of the teeth. In the drawings I have shown an equivalent construction, each tooth having a double bevel at the sides, so that when the tooth of one bar strikes that of another, they .will slip past each other without interloc -king.

To prevent the burning away of theban and especially of the teeth, I construct the ame with transverse slots or recesses y, crossing'tthe bottom of the bar and extending nearly to the ends of the teeth. This insures a plentiful supply of air, and leaves bridges i at the sides of each slot, between the same and the usual longitudinal slot, w, which maintain the strength and rigidity of the bar. These long transverse slots insure a beneficial supply of air, where simple perforations in the teeth would be useless.

In large grates, where the bars are long and When the latter is to be a dropping-bar,

2 ssnssa heavy, the labor of rocking them is frequently very great, even when the usual lever, constituting practically an extension of one of the to the bar B. By this means I am enabled to rock the bars and employ as great a leverage as may be necessary to readily effect this Oh- IO ject.

\Vhile a pin entering an opening in the lever J may serve as a fulcrum, I prefer to use a disk, K, fitting a circular recess in a bracket, L, having a pin, f, extending through a I 5 hole in said bracket, and a fin, t, with a socket, 1;, to receive a short arm, 8, of the lever. By this arrangement the pin f serves merely to hold the disk in place, while the strain all comes upon the periphery of the disk at its contact with the edge of the socket in the bracket. A similar pivoted socket-piece, K, may be connected to the end of the bar B; or any other suitable connection may be employed.

As the bracket L and operating-lever would occupy an amount of space in a furnace-room which is not always perfectly available, I hinge the bracket L, at its inner end, q, to a plate secured to the wall or case of the furnace, so that the parts may be brought to the position shown in Fig. 1, and there held by abrace, 1), during operation. The brace may then be detached or disconnected, and the bracket turned back against the wall, as shown in Fig. 2, so as to be out of the way. The bar B may also be in two sections, jointed at m, and abol t, n, or other device will serve to hold the sections in place until the bracketis to be turned against the wall. In many cases it is objectionable to put the arms D outside of the furnace. In such case I arrange the grate-bar transversely, as shown in Fig. 6, with the armsD extending around at one side of the furnace, and the connecting-bar B extending through a hole, 9, in the front wall.

The arm may in such case be jointed, and a hinged bracket, L, may be hung to the front wall to operate in connection with a detachable lever, as before described.

I do not abandon or dedicate to the public any patentable features set forth herein and not hereinafterclaimed, but reserve the right to claim the same either in a reissue of any patent that may be granted upon this application or in other applications for Letters Pat ent that I may make.

I therefore claim-- 1. The combination, with the bars having sockets w, of a series of separate detachable arms, D, each fitting one of said sockets, and all connected to a bar, B, substantially as set forth.

2. The combination, in a grate, of stationary loops F, attached to the frame, and rocking bars G, provided with rear journals bent at the ends, substantially as set forth, and with movable supports at the front ends.

3. A rocking gratebar provided with lateral teeth, and with slots or air-channels y, extending transversely through the bar and into the teeth at the opposite sides, substantially as specified.

4. The combination, with a furnace having rocking bars connected to an operating-bar, B, of a crank-lever, J, pivoted to a movable bracket at the side of the furnace and connected to the bar B, substantially as specified.

5. The combination, with a furnace having rock-bars and an operating-lever, J, of a bracket supporting said lever and hinged to the body or casing of the furnace, substantially as set forth.

6. The combination of the hinged bracket, operating-lever supported thereby, and rockbars connected to a bar, B, jointed as set forth.

7. The within-described swiveling bearing for the operating-lever, consisting of a disk fitting a socket in the bearing-piece, provided with a connecting-bolt, f, and havingasocket,

a, substantially as set forth.

In testimony whereof I have signed my name 0 to this specification in the presence of two subscribing witnesses.

GEORGE B. MERSHON.

Vitnesses:

ELLwooD BONSALL, C. W. GABELL, Jr. 

